I recently changed from Shellac to Cuccio, and splashed out on their led lamp too!
Myself and my clients are loving it! I love the 30 sec cure times, and the beautiful range of colours. They are triple pigment, and you often get true coverage in just one coat, and no more than 2 coats. Brushes are a good size, easy to use, and the price is competitive to others.
Clients love the high shine, true colour, and 2-3 week flawless wear!
Clients of mine who struggled to get over a weeks wear of shellac (for less than perfect nails) are getting at least 2 weeks with Cuccio, and without the need for a smoothing gel underneath!
I also use megamix. This was initially purchased to use with glitters etc, but I now use it with my cuccio regular polish, pigments etc. It enables me to carry just 12 gel polishes, but create a gel polish from any one of my 40+ regular polishes!
Megamix also cures in 30 seconds, again you get 2-3 week wear easily. Its obviously a little more hassle having to mix / get ratios right etc, but it has proved the perfect solution for cutting down on the ammount of stuff im lugging around to my clients (mobile).
Megamix doesnt have quite the shine some other gels have, but it wears very well, and doesnt fade.
hth and good luck with whichever brand you go with x