My eyes are pretty screwed from years of reading too much, so I had to get powered lenses - which were hard to find (especially in red >__> ) and relatively expensive. The pair I got was from here: [link]
If you can manage without vision correction (good for you), plano lenses are much, much cheaper. You can find some amazing, legit deals. The better-looking ones that don't cost hundreds a pair tend to come only in plano. As for which brand...well, my criteria for a prescription weeded out all but a few and I just picked the cheapest one that's left. I can't really give recs other than to get the best-looking one at a price that works for you - and make sure the manufacturer is a reputable one.
Do the research, especially if you've never ordered contact lenses before; there are some laws involved that you may not expect. Oh and, if you're buying from a large site, google for coupons and promo codes; chances are you'll find some. ;]
I got them from [link] , under the Halloween contacts section. You can get purple ones as regular contacts (that are a LOT cheaper too >__> ) instead of the "special effects" that I had to order. Since, ya know, normal people don't tend to get red contacts for daily wear. Thanks! ^ 3^