I use ext4 on all of my Linux distros, if possible. It seems to me that SSDs are the next phase of the evolution of storage. Having recently purchased my first 1 TB SATA disk for my new gaming rig, I decided to run Windows 7’s system experience test on my system. I scored 7.6, 7.6, 7.7, and 7.7 respectively on each of the tests (CPU, memory, DirectX, and video), but my hard disk dumped my score down to a 5.9 (MS uses the lowest score as the final). I was shocked, to say the least, but my previous system had a 150 GB SATA disk at 10K RPM rotational speed and netted me a 6.5 on the same test.
Size truly does matter, but interface bandwidth and operating system disk operations appear to be the primary concerns.
Hm. I tried ext4 but found it unreliable. Then again, it might have been when I migrated to Xubuntu 9.10 which, installed (once) on this system was so flaky I abandoned it for Xubuntu 9.04 and ext3. Stable.
Some flaky hardware? I dunno. Once in a while I have to pull the power plug for a few seconds and re-insert before getting the old box to boot.