Cartridge or cable upgrade

And my opinion...

Definitely a better cart. It will make a much bigger improvement than cabling. It's hard to beat an Audio Technica OC-9/II if you can get a step-up device or phono stage that can handle it. If not, have a look at a Denon DL-110 HO MC cart. I haven't heard it but others have and seem to like it.

I'd call Keith Herron to see if he can help you with cables. I'm using his cables and they seem very good. And they are very reasonably priced.

The cartridge first!

There are plenty of MM/High output MC's for around $400-700, better than the Blue Point Special.

The Dynavector is one.

Choose cables after the cartridge.

Source first, I find the table unbalanced to the rest of the system. IMHO, sell the turntable, keep the BP and put that money that is burning a hole in your pocket towards a better turntable.

I really don't see how upgrading the cartridge right now, or playing with cable, is going to get you any further down the road.

A record clamp-it honestly was the best money spent on my table.

Viridian, no question about it, a better TT will be able to hold a better cart. That said, the Pro-ject 5.1SE can handle a better cart than the BP2 an WILL sound much better:

Phono cartridges are incredibly sensitive transducers, so they don't just convert the grooves undulations into sound. The cartridge reads the information off the lp and translates it into something the rest of the stereo system can understand and play as music.

The quality of the audio signal depends on cartridge. That is why using a good cartridge is important, as this determines the quality of the sound.

Better cart = better reproduction of music.

Your system is good enough, actually really good. Try a better cart first, then experiment with cables, isolation, mats, clamps, etc.

I also agree with Bpoletti, the Audio Technica OC-9/II will be hard to beat at its price point if you can get a step-up device or phono stage that can handle it.