Okay, so a rare occurence for me just happened. I got 6300 IP, for only the 2nd time out of around the half-year I've been playing. I like to jungle or solo top, and I have about 40 champions already, and I want to buy a strong champion that can be one of the best for jungling or soloing top. Both can jungle or solo top, although jungling renek isn't common.
OR, should I wait for Fizz's release to see if hes any good?

Please leave suggestions :0

and if you play renekton or riven, do you like them?

lol, Renekton

It sounds like you want to buy Udyr.
Udyr is a better jungler by a mile.
I don't see a lot of Udyr top but from what I hear people think he's good at it.

My 2 cents, Udyr or wait on the new champ.
None of them are gonna be in the top tier junglers imo.

Riven is great. She's my main. Her lane and jungle are great (against certain matchups, making her not a first pick) and her late game is unreal.

Renekton is very, very strong early. His Fury buffed spells let him do a lot of damage early on; and he farms like a boss. His only issue is that late game, he's pretty weak.

I'd go Riven over Renekton but wait for Fizz to be released first

renekton is strong early game but does not scale well. he is solid solo top and fun to play. bad jungler
Riven- good solo top. scales well, can jungle(slow but good ganks).
Fizz ? its up to you but i would wait.

Pshh, screw you jawbit. Renekton is good and I <3 him.

Fizz looks like he'll be absolutely awesome though, so unless you want to play as one of the best and most agressive solo tops in the game, I'd suggest getting him. Be warned, though; we are long overdue of a support, and we have yet to have a support-class yordle. In other words, he might be a suppordle.

Not much I can say about Riven, though. I have no experience with using her.

NEVER buy a champion the week it's released. Wait until that champion's free week to try them post-buff/nerf.

Riven

Okay well more people are saying Riven, and Whitebird Alpha has a solid post, and I'm going to stick with that and not buy Fizz. But Renektons early game is just soooo good. Last time I laned against a renekton, I had to lane switch with my bottom ad carry because I couldn't handle him as Nidalee