I would recommend Kvant or Golden Star Lasers for RGB Blocks. One problem that these other RGB lasers is the drivers well suck, they lack the bandwidth needed to display graphics or any other high-speed projection and some of them have the diodes pressed or glued in so repairing them is harder. One of my Gloden Star Blocks is running on all new diodes so for me serviceability is another thing to look for. Blocks that use a plate with 4 screws to keep the diode in are easy to work with, no need to pry out a dead diode and opens the door for other color diodes or power levels and the removed diodes can be reused in other stuff.
The switching drivers common with the Chinese laser blocks I think have a bandwidth of about 10-20khz and in my application meant that the colors where off and where a line should stop left a trail so with the golden star laser block of 1 watt that I have 2 of I had to switch out the stock switching driver with 3 Simpledrives (that are no longer available). We have a projector with a 5-watt Golden Star Laser block that is a sharp beam series and comes with analog drivers that work great. The Simple drive v2.5 have a bandwidth of 100khz and that seems to be fine for laser projection. The Kvant block that I have has drivers that can do the job as well.
The Kvant block I had an alignment problem and sent out an e-mail to them and they responded FAST and sent me the instructions to fix that block , it has one 450 blue running at 1.5 watt and 6 knife edged red diodes with a power of 1 watt and all the corrective optics and TEC inside.
My self I would skip some of the stuff from flea bay unless it's from a company that will respond if you have a problem with it, or just go direct to the manufacture, I am in love with the Kvant block I have.
Thats my current train of thought for RGB blocks
Draco
Remember Remember The 8th of November, When No One Stood, but Kneel, In Surrender
In a popular government when the laws have ceased to be executed, as this can come only from the corruption of the republic, the state is already lost. Montesquieu