In what price range?
For the price most people would consider reasonable, you won't get better than a velociraptor for writes. The next tier above the velociraptor is the Seagate Cheetah 15k.6 (>150MB/s sequential and faster access times than a velociraptor), available in 150GB
varieties, all still cheaper than a good SSD in terms of price per GB. Of course, to use them, you need a SAS controller, which comes included on the Asus P6T motherboard, but you need an add in card for basically any other board. Above that, you have the Intel X25-M SSD
(which is actually MLC, but doesn't suck) or the Samsung SLC SSD
. Above even those, you have the Intel X25-E
Extreme Solid State Drive (SLC based, unlike the X25-M). Above even that, but priced to suit, is the Stec Zeus-IOPS SSD
(not that I would expect that one to be in your price range...).