I've had my IMX SR6010 for going on twelve years, best 5' ultralight I've used. I've used most everything in the 5' range, including the cheaper Quantums, Fenwick, Garcia (that dates me), and Orvis (glass, graphite, and bamboo) rods. The IMX has the #18 handle which has a locking reel seat (I hate sliding rings on spinning and fly rods). There is also a 5' GL3 two piece version that feels a little slower and is equipped with the same locking reel seat as the IMX version. The GL3 SR541 (4'6") also has the locking reel seat and is a bit crisper in action than the 5'.
I just bought the SJR720 for larger streams. It will flick a 1/16 ounce inline a mile, but has significant backbone for larger inlines heavier water and bigger fish.
Tight lines,
JB