Transparent Reference XL (SS for solid state or VU for tube)is really expensive (comes in a wood box) if you didn't notice right? So Transparent had a model change and updated the standard Reference (only one model for tubes and solid state) with the 'XL' technology. Don't buy old Reference you want at least "with XL" (Serial number will have an XL at the end)
This year Transparent Released their new technology which is called MM and that is suppose to elevate each cable series by one level (hense the price increase), and these cables can be noticed by the rounded network boxes.
Don't skimp on the speaker cable it really tightened up the bass more than changing 5k amplifiers I did trying to improve my system.
Now that I've said all this, I have heared the Super with MM technology on Wilson Sophia's with VTL5.5/VTL250monoblocks/ARCAM etc and I was blown away that a complete Super sytem blew my system(older with NHT 3.3) out of the water and I had XL and with Xl cables! So system synergy says a lot to make everything work better, I then listend to WP7 with Reference with XL and VTL450's and Burmester front end (nice!), and finally Maxxes with DCS frontend, Halcro Amps, and Reference XL (OH MY GOD!) Keep in mind this dealer had the rooms accoustically done right and power conditioned and cabled.
The good news is that my setups sounds better than the Sophia and WP7 setup above and I only have 50hours (still breaking them in) on the speaker and they aren't even spiked!
You might try just tranparent speaker cable to see how it flavors your system. People don't understand why my cables cost as much as most of my system but then again that is where I've heard the most gain (after buying the Placette Active Preamp, before it wasn't as significant). I have bought up the MIT line and switched to Transparent at the Ultra, Reference, Reference with Xl and now finally Referenc XL SS (except for my speaker cable.. can't afford that.. need a new amp before I change that)
Each to their own.....
PS Wilsons will reveal any system weaknesses or lack of synergy you have just like your Magnepans did! Nice front end I couldn't afford to get the Wadia (another product I like!) and nice Amp (I'm debating Pass/AccuphaseA50V/Lamm)