Endless debate: monitor + sub vs floorstanding


Have made a simple system with Peachtree Inova and Proac Sig 8 Tablettes on sand filled stands. Lovely sound I am quite pleased with though I'm considering either supplementing my beloved Tablettes with a sub bass (most likely the new Rel T5) OR grabbing a pair of full range floorstanders (likely used Proac as well).

Any thoughts on the relative merits of the two setups in terms of expression, detail, dynamic spectrum, musicality and also flexibility? Intuitively, it seems I may have more opportunities to play with and fine-tune the experience using Tabletttes plus sub.

I realize there is probably no perfect answer here. Unfortunately, my opportunities for a good side by side listening comparison of the two systems is pretty much nil.
marburg
Generalizing here...

I'd take two fullrange speakers over two monitors + one sub. If it's two monitors + two subs vs two fullrange... well it's close, but probably the two + two. And I'd take two monitors + fours subs over the two fullrange speakers. In each case, I'm favoring the system that gives me the greater number of and flexibility with independent bass sources; as a general principle, the more in-room bass sources you have, the smoother the in-room bass response. This according to Earl Geddes, whose ideas about subwoofers I use with permission. The nice thing about starting out with one sub is, you can add another without having to recreate your entire system.

Duke
dealer/manufacturer
You should use subs (2,3,4) even with floor standers. By having the super lows go into a powered sub, you are saving your amp from straining....a good thing.
You should use subs (2,3,4) even with floor standers. By having the super lows go into a powered sub, (((you are saving your amp from straining....a good thing.)))
Only if he was able to High pass the main amp.
Johnnyr
Forget all the previous suggestions and get a large room with Magico Q5s and Boulder amps. Otherwise a used REL sub...I've had all the above mentioned options (except the Magico/Boulder thing...I only heard that in a shop) and in the last year my little used REL Q150 with some modest but well regarded small towers has made me a believer...in my current room anyway.
A lot of good suggestions and thank you all.

The reason I went the floorstanding monitor route with a sub is I basically downsized my system somewhat. I figured using a nice tubed integrated (Rogue Tempest II) pushing the monitors only would free up the amp and let the sub take care of the bass duties. I have the sub crossed at a little below 50HZ and the monitors are full range down to around 42HZ I think it is. After a lot of tuning the sub or trying to integrate it, I know I am close but the bass is a little different than my previous full range floorstanders. In some ways its better because I am getting those bottom octaves :) The bass now is right in the center or centerstage. "Some music" might be overlapping a tad with the monitors. I am going to turn the volume down on the sub some more to hopefully cure the bass hump. A buddy of mine awhile back brought over a test CD and his IPhone had an app to measure frequency response. My bass response was pretty darn even so I know I am close. I am wondering if another sub would help? I do like the idea of my integrated pushing the monitors and letting subs take care of bass duties but not oppossed to an efficient full range floorstander.