Jonathan, I just coming out of the tunnel you are entering, having re-done my PA. After a lot of research, I got Yamaha DBR15 mains. Excellent speakers with lots of power, weighing less than 40 lbs., and have a seven year warranty! These are an excellent "one box" speaker for a small venue - no need for subwoofers. As for my mixer, I first tried the Mackie DL1608. This is a very small and light 16 channel digital mixer. The only controls in the mixer are 16 gains and a headphone jack and volume. Everything else is controlled by an iPad. You can either slide the iPad into the Mackie, or hook up a router and use it wirelessly. Thus, you can walk around the room mixing. It has six aux outs that can each be controlled by a separate iPad or smart phone. You can give each band member control over their own monitor mix, either through wedges or IEMs, which brings us to the monitor question.
You can get powered floor wedges, or an amp and passive wedges. Since I already had four passive wedges, I got the Behringer iNuke NU4-6000 - a four channel amp that puts out 4x440 watts into 8 ohms - plenty enough power for monitors from a relatively inexpensive, flexible, and lightweight amp. Yes, I know it's "Behringer", but some of their stuff is actually good. This amp gets great reviews and I love it, so far.
Alternatively, you can go with IEMs. More costly, but you will all hear better and there will be a lot less to schlepp without floor wedges.
Getting back to the Mackie,after spending some time with the DL1608, I upgraded to the DL32r. It's 32 channels instead of 16. You can plug an external harddrive or a computer into it and it can record 32 tracks. This is great for recording live shows and rehearsals. You can also play it back through the PA to do a "virtual soundcheck" during set up without having the band onstage actually playing. The DL32r also has 14 aux outs.
If after checking it out, you have any interest in the DL1608, I have one for sale.
Bill, tgo