Cartridge for Rega Planar 3?

Btw. The Herbies mat on the stock platter is killer.  No need for acrylic which can have its own coloration. 
And do give it that rega nudge. Belt will last much  longer.  

I have a (more than a little upgraded) Rp3. Not much different than the planar. With a 3mm shim, I'm running an ortofon 2m black.  I haven't heard a better match for the 3 range Regas. MM or MC. 
The compliance issue is importatant with the rega arm as it's not high enough mass for the 103's imo.
As to recievers and  integrateds, so much depends on the quality of the phono section. Maybe the most cost effective way to get the most bang would be to go with a moderately price phono pre into line level input.  G Slee two, perhaps? 
With a 2m black you could squeak in around 1k.  Look on eBay for discounted 2m's