I flew EZ Topline 50 with YS 53/63.

For ARFs,

BeatOn 50, Hydeaway 50 are very similar to Topline in performance. They are all around 530 ~ 540 sq-in wing area. They have a little high wing-loading because of small wing, but I haven't had problem at lower speed with my Topline 50.

I actually have all the above, but only flew Topline 50. Both BeatOn & HydeAway are still in box.

If you have GP distribution in UK, Venus is also good.

Your Stream 50 High performance is also very nice design by G. Naruke.

Kyosho Majestic, (Yoshioka/Kyosho) Sensation, SonicSport, Aurum are also good.

For kits, MK Aliance, Synergy etc are available too. I have no idea what other kits are available at this time.

H9 Aresti, Global Avance, FreeStyle etc are not in my taste, but heard good about them.