Very nice new receiver you got. The SC-61 has the new Class D3 amps and are 4 Ohm stable. So you have the power to drive quite a few different brands of speakers with no worries.
So how did you like your Infinitys? Are you looking for the sound of the Infinitys but in something more current and updated? Or are you searching for a sound entirely different? What type of tweeters did the Infinitys have? Soft dome, metal dome, or ribbon? Are you partial to this type? Each type of tweeter has a distintive sound. What kind do you prefer? See what I am driving at.
Speakers may be the most difficult of all components to recommend. We all have preferences in what type we prefer. I for example, prefer dynamic, full range towers with soft dome tweeters. They sound smooth and laid back to me vs a more lively, bright speaker. A grand is a substantial investment to make in a pair of speakers. If you can, start audioning different types and zero in on the sound that you prefer. If you can't audition due to lack of availabilty, then you have no choice but to seek recommendations. Jim Z made a real good one with the Focal 814v. Besides the sonic attributes he describes, they are also $1800 a pair speakers marked down to $779! That may be the best part to like. Believe me, the discount is genuine as these do truly sell for close to $1800 at other dealers. They are a steal for well respected, high quality speakers and not bad to look at either in that beautiful piano black finish.
I still suggest though you spend time listening to a variety of different designs first if you can. Good luck.
Marantz PM15S2 LE, Oppo BDP-103, Simaudio Moon 100D DAC
VPI Traveler V2 with an Ortofon Rondo Blue and Simaudio Moon 110LP, Technics SL-1400 with an Audio Technica AT-14sa and Pro-ject Phono Box S
Dynaudio Focus 260's, Rel T-1 and a Panasonic TC-P54S1.