Hey,
I got the Presonus Tube Pre. I don't know too much about this yet, but it's done fine by me so far. I'm not doing pro work, but I haven't been disturbed yet with it's performance- and when I get disturbed with something, it's pretty much over. I've used it to pep up my bass signal at a live gig, and to send phantom power to a couple mics, live, and in the home-torture chamber...
Seems to give some range of capability, to my ears,... it has the tube drive as well as a separate gain stage. And it's not particularly noisy. I do understand from some that the Blue Tube is a tad 'hissy'. Haven't tried it, though.
Unless you're moving into a higher price bracket, yep, it seems you can just go get something to bring your signal up to line-level. The hybrid (tube/solid-state) idea is fun. And the Tube-Pre has that cool (read: Bogus) red LED where the tube is!
Good luck!
Oh! Sorry, the above post mentions the Blue Tube DP, which I think is different from the plain old "Blue Tube".