Rogers LS3/5A Replacement Recommendation

I owned Harbeth HLP3 and LS5/12a for 6 years and they are nice improvements on the LS3/5a. However, with small "woofers" you always get small sound. The 5/12's did have better bass than the P3's. Having heard the ProAc's I'd have to say that the Harbeth's have better music.
Another option, though I have not heard them, is the small speaker from Coincident Speakers (www.coincidentspeaker.com)
It's a little larger, and also has a larger (6 1/2") woofer. It's quite efficient (something that the Harbeth's are not). With the increased efficiency and larger driver, bigger sound and more bass should happen.
There's also the Audio Physic Step, but I've not heard those either.
My experience with the Harbeth's was that the lack of bass got tiring and I had to get a small, fast subwoofer (hard to get one that had a fast enough driver).
Harbeth eventually came out with a passive subwoofer for the HLP3, the X-Tender. The X-Tender also functioned as a stand for the P3's. The driver is same as in P3. I used the X-Tender with the LS5/12a's and the sound was great for most all music with a good bottom to the sound. I don't know if Harbeth still makes the X-Tender or not.
BTW, I no longer have any Harbeth speakers as they were sold last year when I got new, and larger, speakers.

Check out the Spendor SP3-1P. It is 2-3 times the size of the 3/5a (still relatively small), and uses a larger low frequency driver. It retains much of the 3/5a's magical midrange, yet with more extended top end and substantially deeper, and heftier, bottom end. List price is right at $1500. There is a nice review from TAS on the Spendor website. A second option is the Rogers ll ohm 3/5a with the AB 1 subwoofer. There is a used pair on Ebay just now for $895, which is a really good deal. Just remember that the newer models take a REALLY long time to run in. I hooked my 11 ohm units up to an FM receiver 24/7 for two weeks, and this yielded a nice improvement. (They were purchased used, too.) A second round made less difference, but I like them much better than when first purchased.

I haven't owned the Rogers, but have listened to the Totems, and like the soft tweeter, more open stage, and better bass of the Reference 3A mmdeCapo, $2400.00 new. A Canadian company that also makes the same speaker in a granite enclosure, I'm told, for over twice the price. Has a carbon fiber driver with a soft dome tweeter-with no crossover.

I've had the same dilemma for many years! I tried all sorts of different speakers but always went back to the LS3/5a. I used them with a subwoofer - compensates for most of their deficiencies, especially if you cross them over at 120Hz.