Help with first cable upgrade.


I have a Musical Fidelity v-150, rotel rp-3000 turntable and an old Sony CD player.  I have 2 sets of speakers B&W CM2's and JM Lab chorus floorstanding speakers I may have to part with due to space.  My power cables and interconnect cables are cheap stock.  My speaker cables are a 20 year old or so set of MIT shotgun cables.  Any recommendations for budget friendly cables that may help the bass or soften the brightness of my system?  Thanks.
shimanole
Yes Stuart.  I actually have an old Toshiba XR-30 (something like that) and a sony DVD/CD etc. with built in DAC that I can try also.  I'm just going to have to remove an entire closet worth of the wife's crap to get to it.  Might break out my first receiver while I'm in there The Fisher 800.  : )
Mogami W3104 for speaker cable. 

Mogami Studio Gold for IC and coax . Also for XLR cables.
Have been using on different systems over the past 20 years.
Very satisfied.

Mogami W3082 is better than W3104, more transparent, the 3104 is colored...