I guess I am the man to help you on this...
You have multiple options with this accord really so lets start at engine:
1. F20B2 is a super reliable motor. It may be a bit down on power due to its SOHC, non-vtec and low revving design, but it responds REALLY REALLY well to head porting and forced induction .. ie. turbo.
The automatic transmissions on these have held up to turbocharging before, but I wouldnt do that if it was going to be a daily driver.. Most turbo setups definitely go the manual route
2. If you do not want to turbo, you really only have two worthwhile engine options for this vehicle..
H22 as was mentioned before and F20B twin cam (bluetop)... Both put out roughly similar figures with the F20 being a slightly higher revving and higher compression motor to make up for the difference in displacement..
I would start looking around bamboo and doing some comparative pricing... H22 is easier to source parts from in the US if you ever need to though..
Both of these motors come with automatic if you can find it and the transmission is designed to take abuse.. You will lose about 20 hp on each engine when choosing the auto instead of manual though. so around 180hp instead of 200.. Also, if you are on the stock exhaust, I dont think those will take too nicely to it so you may be looking at an upgrade (to go along with the CAI you already have)
About the suspension setup you have.. Looks very promising. All it will need are some good tyres and possibly one of the energy suspension or prothane polyurethane bushing kits..
About the rear drum to disc.. I am currently in the process of amassing parts to get mine done..
If the vehicle didn't come with ABS, its unlikely you will ever really be able to go that route as its a real nightmare...
Basically this is the cost of converting the rear..
Rear disc conversion hardware is about $1000 in the bamboo,
i bought new brembo sport slotted rotors for the rear.. about $140 US
used 40/40 proportioning valve to make the rear brakes do some work , about $40 US
You will most likely need new brake lines as well because the people im bamboo tend to cut them, so I bought a set of goodridge stainless steel lines for about $150 US
Overall everyone who has done the rear disc swap has loved it, but they all agree that you NEED the 40/40 proportioning valve to make it worthwhile..
Some tend to upgrade the master cylinder from 15/16" to 1" but I don't think its really necessary..