Turntable advice?

I have a modest, entry-level system consisting of:
-Bel Canto s300iu
-Linn AV5140/Espek
-Rega P1
-Naim Stageline phono stage
-MacBook

The vast majority of my listening is via computer, but I like vinyl for those really special albums (the "desert island" picks, if you will). For a while, I've been considering upgrading the turntable (The rest of the system will also go through periodic upgrades, but the TT was my first consideration). A local dealer offered to let me audition a Michell TecnoDec, and I accepted.

I have a couple of issues:

1) The turntable itself literally does not fit into my cabinet, where the P1 currently resides. Everything but the motor goes into the spot, but, while I'm no expert, I'd wager that the motor plays a key role in how the music sounds.

2) I have a nagging fear that the TecnoDec, on my little system will highlight the fact that I do have a modest, entry-level system and will figuratively not fit in.

Is my nagging fear grounded? Would it, in essence, be like dropping a V-8 into a Fiero (No offense to any Fiero owners out there)?

Any advice from you seasoned turntable experts will be appreciated.

If you need to know, my vinyl listening habits tend mostly toward rock, but a lot of acoustic stuff: Elliott Smith, U2, Johnny Cash, Iron & Wine . . . . .