Internals can be better in smaller tanks though. I prefer internals, more neat and tidy, externals can be confusing, noisy, expencive and they can suck up small fish if your not careful.
I think you should go for an internal, powerful and quiet. But many prefer externals for their big area of media
But those are so not small tanks - and to be fair I don't think you can really judge if you haven't actually used both and are able to compare like for like on a tank.
You absolutely love your Fluval 2 I know - but honestly if you used an external, you'd know what the incredible difference is and understand why I feel so strongly about it.
Edit: How are external confusing ?

They couldn't be simpler or easier.
I've had more internal filter disasters sucking and mangling small fish than I've had external - in fact: no external disasters!
How can you make those remarks if you haven't had both types of filters to compare ?