I have an older Mac that I'd like to speed up a bit. On of the most obvious things I can do is replace the internal 5400 RPM drive with an SSD. I've done it before, but cracking an iMac apart is a painful experience I'd rather not relive. So I hit upon the idea of putting the SSD in a Firewire 800 enclosure and booting from that. So I got a Firewire 800/USB 2.0 enclosure that was an "Iomega Mac Companion" in a previous life. As it turns out, this turkey only boots from USB, not Firewire, even though the drive is visible and accessible over FW800. Actually, using the drive as boot media over USB is a noticeable improvement over the internal drive. But I'd like to make it as responsive as possible. So can anyone recommend known bootable Firewire 800 drive enclosures? I'd prefer first hand experience, if possible. I'll probably be buying used, so older product suggestions would be useful.