Check out
this list from Newegg. It shows 180GB and higher SSDs that use the SATA III interface and cost less than $350. I chose $350 for the price cap to give a little extra wiggle room (and because limiting the price to $260 would not have shown a $270 drive with a $20 MIR).
In a nutshell, if you want a 240 GB or better drive then you have only one option: the 240GB
OCZ Agility 3 AGT3-25SAT3-240G for $260.
Here's a more detailed synopsis of what is catching my eye for under $270:
1) The only drives Newegg currently has in stock for $270 and under without a mail-in-rebate required are 180GB or less. You could grab a 240GB
OCZ Agility 3 AGT3-25SAT3-240G for $260 after mail in rebate and pick up a free copy of Mass Effect 3 in the process, but everything else in stock with greater than 180 GB capacity is $270 or higher.
2) They are out of stock on a couple really nice options. The 240 GB
Mushkin Enhanced Chronos MKNSSDCR240GB (uses Asynchronous ONFI NAND) is listed for $244 + $5 shipping and the 240 GB
Mushkin Enhanced Chronos Deluxe MKNSSDCR240GB-DX (Toggle NAND) is a more pricey $279 + free shipping. The second one is obviously more than you are looking to spend, but I mention it because I checked for
both on Amazon. On Amazon, the Deluxe is
selling for the same price as Newegg, while the "slower" of the
two drives is actually going for $300+. The Deluxe would be a great buy if you can scrape together the extra money.
3) There are a couple drives in stock selling for $300 and up with mail in rebates bringing your final cost down to $270 (still a little higher than you wanted). I'll simply list those options below:
Corsair Force Series 3 CSSD-F240GB3A-BK (240 GB)
OCZ Petrol PTL1-25SAT3-256G (256 GB)
Oh, and the least expensive Intel option is the 180 GB
Intel 520 Series Cherryville SSDSC2CW180A3K5 for $280 after a $20 off promo code. You are looking at $330 if you want a 240 GB Intel SSD.
If it were me doing the purchasing, I would grab the Mushkin Chronos Deluxe from Amazon. It seems like the best bang for your buck option and doesn't require a mail in rebate. If I were making a strictly financial decision, then my recommendation is the $260 OCZ drive. I can't speak to OCZ's quality and durability, so someone else will have to weigh in there. I think I've heard people say they are good SSDs while others say they would stay away. I hope that info helps.