Yes, cartridge-tonearm matching is key. And the Cartridge and Tonearm Databases over on Vinyl Engine are an excellent resource for determining a good cart-tonearm match.
One tonearm maker that offers considerable versatility in this area is Moerch, which has easily swappable armwands, which are available in a number of different effective masses. It is the effective mass of the arm that needs to match up well with the cartridge's compliance. An additional advantage of Moerch's armwand system is that it becomes easier to use multiple cartridges without the structural compromises inherent in swappable headshells.
As for Rega's, they are well-thought of arms, but you will also find many upgrade kits that will improve their performance. From rewires, to structural reinforcement, to VTA on-the-fly, to upgraded bearings. I really liked my Audiomods arm, which is the most extensively modified Rega arm, IIRC. It served me very well before I moved to Moerch arms for the reasons cited above.
One tonearm maker that offers considerable versatility in this area is Moerch, which has easily swappable armwands, which are available in a number of different effective masses. It is the effective mass of the arm that needs to match up well with the cartridge's compliance. An additional advantage of Moerch's armwand system is that it becomes easier to use multiple cartridges without the structural compromises inherent in swappable headshells.
As for Rega's, they are well-thought of arms, but you will also find many upgrade kits that will improve their performance. From rewires, to structural reinforcement, to VTA on-the-fly, to upgraded bearings. I really liked my Audiomods arm, which is the most extensively modified Rega arm, IIRC. It served me very well before I moved to Moerch arms for the reasons cited above.