I can’t comment specifically on the RX other than it is a beautiful boat and I would love one but I can comment on the ESP with a Yamaha 300. It’s a blast! I have a 26LXL with ESP and a 300. Fully loaded with gear and 3 people it will still do 44+ (my dealer said they got 47 during their lake test). I can cut the steering wheel at full throttle and it just carves into turns like it is on rails! Tons of fun! Make sure to get the biggest fuel tank you can, you won’t regret it.
Personally I found the new LX Helm far superior in design over the RX: it has a door (RX is via the cushion only), I did not like the slanted foot rest on the RX (not raised), no side light. I also greatly preferred the SB Plus (folds flat for longer bed) for the L over the SB Deluxe (fold flat but inside the storage and thus not as long and takes up storage) for the R. I calculated a $15K net savings going with the LX after getting the upgraded seats and lights. I did like the smooth panels and recessed front lighting on the R models, but did not find it worth the additional dollars (vs the larger engine - LOL).