I've been several using VanTec NexStar enclosures such as
this one for a few years and have been pleased with them. I like the solid extruded aluminum construction - it seems to do a good job of dissipating the heat generated by the drive. Versions are available with various combinations of USB, eSATA and FireWire connections.
I've recently started standardizing on "green" drives for use in these enclosures because they run much cooler than standard drives. I've never had any problems with standard drives in the enclosures, but less heat is a good thing.
I've used 1TB WD Caviar Green drives (WD10EADS) in these enclosures without any problems. Not sure how much larger a drive they'd support.
Edit - I see in Newegg's description of these drives it says they work with capacities up to 750GB. But I'm sure that's a typo because as I mentioned I've used this exact enclosure (model NST-360SU-BL) with 1GB drives and it works fine. If you look further down in Newegg's web page on the right side under "features" it states that the enclosure supports drives up to 2TB.