You'll have to help us out a little with what you're looking for, what your
console(s) is, and tell us more about your application and budget. Two of the fixtures you linked to are more like track-light fixtures than
stage lighting fixtures. They have the output for accenting artwork in a
gallery or a
lobby but do not have the horsepower for cutting through gels and lighting up a
stage.
The cost of quality color-mixing
LED's has come down quite a
bit. Unless you're not in a position to string some
DMX cable out to your fixtures or you absolutely never need color, I would ignore the white-only
LED options on the market. They may be the right fit for you but are becoming increasingly irrelevant every time a new color mixing
LED fixture comes out at a lower price and a higher brightness output.
Source 4WRD only works for full-size. No dice for retrofitting your Jr's.
My go-to for color mixing
LED ellipsoidals is
ETC's Colorsource Spot. With a
lens tube, you're looking at ~$1750/ea. If you don't need shutters, the Colorsource
PAR can be pretty cost-effective at more like ~$800/ea. They have such a tight beam before you put diffusion lenses in front of them that they can act as an effective spotlight from a fair distance without casting as much
spill all over the place like you'd get from a
PAR (like I said though, no shutters).
I haven't tried it myself but I've also heard good things about Chauvet's Ovation E-910FC, which like the Colorsource fixtures has
RGB/Lime emitters for color-mixing. Rumor has it these are fairly comparable in output to the Colorsource Spots. With a
lens tube, in the neighborhood of $1350/ea. It's part of Chauvet's Professional lineup, which supposedly comes with a better
level of quality, reliability, and customer support than Chauvet's DJ products. From the people I've heard have had to get Chauvet on the phone, the support's been stellar but I think it remains to be seen if Chauvet's professional products will have the longevity of the usual suspects over time. Seem to recall that the only knock I've heard against the E-910FC was that it didn't converge the colors of the various emitters quite as well as and thus was more likely to give you rainbow fringes in the shadows. Possible that's the kind of thing you only notice if you're looking for though.
As with everything, get a demo and try before you buy. Also get quotes. The pricing you find online is more targeted for buying one or two fixtures at a time and is based on the lowest
level price manufacturers allow their dealers to publicly advertise at. This is so all the dealers
play nicely together in the sandbox. They can almost always give you better deal in a quote and help guide you through the accessories you'll need (
DMX cables, clamps,
power jumpers, lenses, soft diffusers, frames
etc.)
When comparing fixtures, be careful to avoid putting too much weight on specs. It's a big of a crapshoot how the different manufacturers measure and advertise their products. Makes it difficult to compare apples to apples by the numbers. Also doesn't speak the more subjective issues at
hand. Smoothness of dimming, loudness of a fan if there's fan cooling involved, uniformity color mixing across pool of light at short and at long throws, side and relative clunkiness of fixtures,
etc.