The Echo card is good, but it will break quite quickly. The volume control is on the actual unit, so this puts stress on the already flimsy PCMCIA plastic outer body)
I had this card a few years ago. It looks cool, and works OK (apart from the Blue Screening issues :S) but it will break with light to medium use.
If you can get it cheap, then it is cool, but if you are paying retail for it and you dont intend on moving your computer around a lot, you would be advised to look elsewhere at an interface with a breakout box (this will give you more options for mic lines etc)
the indigo io is delicate, it works good for me though, just don’t man handle_it_at_all.
i’ve gotten it down to 5ms of latency with supercollider3 on my t23.
i imagine something much much newer like the above notebooks could make it shine like the sun!
I guess I’ll be working at many places, mostly outdoors, so I’d need something light. I know there are many lightweight USB and FireWire audio interfaces, but I’ve been advised to avoid USB audio interfaces, and as far as I know, FireWire on PC laptops doesn’t provide power for the unit. You’ll need a power socket and these are quite rare in the forests.
All in all, PCMCIA is the best interface for audio cards you can find on a laptop. Sadly not nearly enough manufacturers make such cards.