I don't see where you say what you already DO have, or are we supposed to assume you're starting from scratch with nothing?

also there are several other variables to consider:
what and who will you primarily be recording?
guitar?
keyboard?
MIDI?
bass?
drums?
acoustic or electronic?
anything else?
how many will need to be recorded at the same time?
do you need low latency for monitoring software
if you plan to use a MIDI controller to monitor softsynths, you need low latency
if you plan to use guitar amp and cab sims (such as IK's Amplitube) and need to monitor it as you're recording, then you need low latency.
NOTE: if you use keyboard AUDIO out or don't need to monitor the actual GUITAR SIM sounds while you're recording, then you don't have to have low latency - you can monitor from outside the box which makes things a lot eaiser. then you can change the softsynths or Amplitube settings later.
how fast is your current computer?
what other things will you be doing on this computer?

all of these questions and maybe some more need to be answered before I could recommend anything. there are too many variables just to make a blind recommendation.