Logic Express 6 & Tascam Us122, On a Dual G5... Options

[Pujee]

I guess this is both software and hardware...
A friend is offering me a Tascam US122 Audio/MIDI Interface and Logic Express 6 for a total of $200. Obviously, I would be saving money as this is a $4-500 value, but would you recommend these products for home recording? I have read both good and bad reviews for the Tascam US 122, and one continuous complaint was latency issues...although I think most of those people were Windows XP users, which I will not be, as I am planning on getting a Dual 1.8 G5 PowerMac.
I'm not recording a full band or anything (right now), just my vocals and guitars, and I'll probably add tracks with Reason or something. Will I be too limited with Logic Express 6? I can always upgrade to Express 7 for about $90...I have a limited budget though, so the $999 version of Logic Pro is certainly out of the question...prior to this offer, I was also thinking of an MBox w/ ProTools LE...Any other thoughts?