Dynavector DV20X2H or DV20X2L

Dynavector cartridges are very good, i have owned 3 of them including high output version DV-30A, then KARAT 17DS MR (Diamond Cantilever, Micro Reach tip) and KARAT 23RS MR (Ruby Cantilever, Micro Reach tip).

But it is not true that Dynavector is better than any MM from the same era. 

Audio-Technica AT-ML180 OCC is unbeatable, Grace LEVEL II LC-OFC BR/MR is unbeatable. 

Grace gave us so many options with different cantilever/styli that interchangeable. 

Your phono stage will work fine with either cartridge. Just google the specs or a review for your answer. No reason to buy a SUT with 60db gain for MC.

out of those two cartridges I prefer the 20X2 Low. 60db gain is fine but the load option may be high. I bet it will still sound superb!

No you don't need a megabuck phono stage for a low MC. I started out with a Dynavector P75 (not even a later Mk version) with 60dB gain and a Benz Micro Glider L2. It was a great starting setup that made me very happy! Your CA Basic+ looks good too. Later on I tried a Benz Wood M2 (up a level from the Glider, but with higher "medium" output) and it just felt like the low-output version would've probably sounded better. Go for low output. 

I found the better the phono the more I got out of the Dynavector 20XL2. I started out w/a P75MKIII which gave me a very nice sound. I then moved to a Shaker Logic phono which has a Cinemag Blue SUT. Quieter background and a wider soundstage. Currently my Luxman CL38U-se built in phono uses 3 JJ ESS-802S tubes and 4 SUT's (2 for MC High and 2 for MCL) has taken this cart to another level. More dynamics and clarity w/a big soundstage and black background. I feel I'm getting 100% of what this cart can deliver.