Budget floorstanders under $500 ?

With the size of your room, why not go with a larger--and more refined--monitor? At the price range you're looking in, you could get a lot more for your money (especially buying used, and assuming you already have stands). Check out speakers from KEF's older Q (Q15 is great: look on eBay) or newer iQ lines. They're front ported (great for a small room) and have ~90dB sensitivity, which would work well with your Jolida. KEFs have a great, warm sound with a beautiful midrange that would suit your listening tastes ideally. I have a considerably more expensive pair of Vandersteens now, but I still miss my Q15s: they really got voices right. As I recall, they went to the mid-50s in the bass. Always sounded great in even medium-sized rooms. A step to floorstanders at the price you're considering would likely be a step sideways.

I do think the step sideways could be gaining some bass (that might not be all that well defined or might create room-interaction problems) while giving up some mid/high frequency refinement. For the music you listen to, I'd think a less musical midrange would be a big downside.

All the suggestions above are good ones, though I will say (though I love my Vandies) that the 1c probably wouldn't work in your room as you need to keep them away from boundaries and be able to sit 8 feet away from them (so the time and phase aligned drivers can come together by the time they reach your ears). Part of the reason I like KEFs is that they have a (more or less) point-source approach (tweeter mounted in the middle of the midrange driver) that gives them very even dispersion and great soundstaging--not very fussy in terms of where you sit in relation to them at all. Triangles and others, same thing essentially compared to Vandersteen--easy to use in the near-field.