Toyota wants $2,300? I assume that's without the cats because they're around $1,700 for each side. Do you actually need new cats or are you just looking for a catback system?
A new Borla 14814 stainless catback is around $700-$800; that's what I have and prices have gone down since I did it in April. I was debating on whether offering up the extra pennies and going full OEM but I saved a lot of money and got a quality aftermarket setup instead.
I replaced my cats at the beginning of the year only because I had a bunch of tax return money that I wanted to put towards my truck, had some minor bodywork done and my exhaust... it was around $2,800 total for both sides from Mid-Atlantic Toyota Parts (they want $1,361.71 per side), plus $800 for the Borla catback and other minor things such as bolts and all that jazz. I hung the exhaust myself so there was no labor!
I guess it really depends on what you're gonna want in terms of sound, clearance, etc. I'm not a heavy offroader so clearance issues weren't a concern and I like the more aggressive sound of the new setup over stock but that's just me! There are plenty of opinions to go around! Just my .02.
Rich
PS: I'm not affiliated with Mid Atlantic Toyota Parts in any way! I just find their discounted prices great, aside from our vendors on this forum!