My car is having the timing belt, water pump, and tensioner done right now. My local shop quoted me $750. I went on team integra in my local forum and asked someone to do mine. UNDERGROUNDAUTO is doing mine for $400 with parts (parts are like $312). The guy really knows what hes doing, and you cant beat the deal. I would recommend this being done first. Its VERY important that it is done on time. If the timing belt should snap, youre looking at a new head. Your valves drop down, allowing them to be smacked and bent to shit by the pistons. That should be on the top of your list, since you're 10k miles over due.
Also, valve cover gasket and head gasket arent the same thing. On the top of your motor, you have that big black metal cover with the oil fill hole. Thats your valve cover. Under that is the valve cover gasket. It covers your valves, rockers, etc. It is what sits on top of your head. The head is the top metal part of the engine. If you look down by your header, youll see a seam that goes all the way across the engine. The seam is below the headers. The part above the seam is your head, and below it is your block. In between this area is your head gasket. A head gasket job will run you close to, if not more than $1000 if you take it to a shop. Parts are only around $200, the rest is all labor.
The red part is the valve cover.
This is what a head looks like off the block.
This is a block, without a head on it.
This is a head gasket.
And heres a picture of the internals of a B18C1 (gsr motor).

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ALL Motor B18C1
A 5th lugnut is just added weight.
Integra Arsenal:
1991 LS Special Ed- Sold.
1997 GSR- 192whp 130wtq all motor. SOLD
1991 GS- automatic daily driver.
FOR SALE. $1500 PM for details.
1998 Nissan 240SX SE
New!
And a 2000 Suzuki SV650