first, you can't go wrong whichever. the Oracle V is quite a good tt. your 301 is quite the beauty too. nice job on the plinth. it does not get much better than the Io Sig.
if i were you i would find another arm board for your Garrard and mount the SME V on it with the Koetsu RSP. this should tell you quite a bit about which tt rocks your world better. my opinion is that your Rega arm is holding back the 301.
personally; i have a Garrard 301 with custom Steve Dobbins (about 90 pound constrained layer) plinth, a Triplaner, the Kokomo bearing upgrade, and i use the Loricraft PSU 301 AR power supply. i did have the Koetsu RSP on it until recently. it was a killer combination! my opinion is that the Oracle V would not be in the same league with a fully optimized 301.....but i'm guessing a little......i do think your Quads would sing with the energy from a fully tweaked 301.
my only concern would be the combination of the Koetsu RSP, the SME V and the Garrard. all three tend to have a bit of mid-bass fullness (the Garrard more a general roundness--particularly from what i hear about the grease model of the 301) and the combo might be too much of a good thing. i think the SME/RSP combo works with the leanness of the Oracle V. the neutrality of the Triplaner was the balance in my system.
synergy is always key to musical magic.
i know you asked questions i'm not answering but the first thing is to settle on which tt to focus on; then you get into where that goes.
if i were you i would find another arm board for your Garrard and mount the SME V on it with the Koetsu RSP. this should tell you quite a bit about which tt rocks your world better. my opinion is that your Rega arm is holding back the 301.
personally; i have a Garrard 301 with custom Steve Dobbins (about 90 pound constrained layer) plinth, a Triplaner, the Kokomo bearing upgrade, and i use the Loricraft PSU 301 AR power supply. i did have the Koetsu RSP on it until recently. it was a killer combination! my opinion is that the Oracle V would not be in the same league with a fully optimized 301.....but i'm guessing a little......i do think your Quads would sing with the energy from a fully tweaked 301.
my only concern would be the combination of the Koetsu RSP, the SME V and the Garrard. all three tend to have a bit of mid-bass fullness (the Garrard more a general roundness--particularly from what i hear about the grease model of the 301) and the combo might be too much of a good thing. i think the SME/RSP combo works with the leanness of the Oracle V. the neutrality of the Triplaner was the balance in my system.
synergy is always key to musical magic.
i know you asked questions i'm not answering but the first thing is to settle on which tt to focus on; then you get into where that goes.