I won't pretend to have much expertise to share with you about those discs, but I have heard some damn consistent advice from experienced and pro players... over and over and over again.
They all say spend your first year throwing only a midrange disc and a putter. They recommend the same four discs every time: Putter to be either an Aviar or a Wizard and the midrange to be a Buzzz or a Roc. The idea is that these are all very consistent, versitile, straight-flying discs that will teach you just how to grip and release consistently.
Too much variety in your bag when you're new will just confuse you and your arm. I've heard these folks go on and on about how the big distance drivers like the Nuke will totally mess with a beginners form as you attempt to compensate - they're designed to be thrown really fast and if you can't throw them that fast, you'll naturally start trying to throw them anhyzer (assuming a right hand, back hand form, where the edge of the disc that is away from your body is pointed up away from the ground on release to force a right hand turn) so that they actually fly and draw an "S" shaped line rather than diving into the ground right away. That compensation will carry over into your general form and cause you to start throwing all your discs that way and it'll take you even longer to unlearn the bad habits of overcompensation.
If you feel you must ditch the advice about avoiding drivers all together, I suggest a TeeBird. They are really straight flyers that don't require a ton of speed to fly correctly and have a modest length edge so they won't change your grip too much.
It'll be several years before your arm speed get's there as it's all about form, not about strength at all. Focus your energy on accuracy in your approach and putting - you can't get the distance, so it's better to think about the short game. Getting your shots to land where they will set you up for an easy next throw is really the key ingredient to a lower score.
I've honestly seen many experienced players who followed this "disc down" philosophy at first who can now throw a putter further than I can throw most distance drivers... it works.
Another tip for beginners (that I learned the hard way at first) is to pay attention to weight. Innova and Gateway always write the exact disc weight right in the middle of the disc (i.e. 172). Discraft used to, but now they just use a sticker that shows a range that the disc weighed between (i.e. 167-169g). As a beginner, I had a much easier time and got more distance out of the lighter discs between 163-168g. The heavier discs just seemed to slow down and fade (that hard left turn into the ground) way too early.
Finally, unless you plan on replacing a disc every other game, buy hot pink or neon orange discs (bright blue is good in the fall). Those cool looking tie-dye discs and manly dark colors seem like a good idea until you realize you're spending more time looking for them, right out in the open, than you are throwing them. Seriously, even if that tie-dye has pink and blue and orange and red in it, they just turn into camoflage that your eyes can't distinguish agains the leaves and grass. The worst violators are green, brown, black and yellow (in the spring and summer, yellow just looks like a ray of sunlight on the ground and in the fall it's a fallen leaf). Also, mark your discs with your name and number: you will lose them from time to time. Sure, 60% of people will probably just marker over your name/number and put their own, but that 40% of the time when a cool player or fellow club member finds them... you'll be glad you took that extra 10 seconds.
2013 STLDGC Tag #107
2013 SCCDGC Tag #78