If you want primarily DIY, there a quite a few threads here that show individual builds using a variety of technologies including COBs, strips, etc. Solstrips is one example where you can obtain quality LED strips with modern discrete diodes for a DIY or partial DIY fashion. You can get a good bang for the buck with a bit a sweat equity.
Palindrome has been doing some cool experiments with his LED upgrade:
Here is a nicely executed build using the before mentioned Solstrips:
For fully integrated solutions, keeping the amount of DIY effort to a minimum, there are also quite a variety of vendors with varying levels of quality and at varying points of costs. If there is something out in the marketplace that caught your attention, let us know and you'll get some thoughts and opinions.
A recent conversation that might be useful:
Do you have a budget in mind? Size of flowering area? Want to do DIY? Do you have any primary concerns such as power consumption, heat dissipation, safety (e.g. wet)? Balanced spectrum? I know there is a lot to decode but some of your details and thoughts might help further tune some of the suggestions.