Where/what retailer did you find that combo?
newegg lists the board for $60 and the CPU for $50, so the combo is pretty close.
I'd stay away from copper shims. Use a non-conductive one if you go with a shim. I've seen 2 blown cpu's that were shorted by a copper shim, out of 6 installs I've seen. Not a good ratio at nearly $100 a cpu

And use thermal grease if you have it, but don't pay a lot for it or find it at a local store. It will help, especially with a generic HSF on an AMD cpu.
I've been using AMD cpu's and love them, but the cooling must be paid attention to. Most generic bargain heat sink/fans do an adequate job at best, so make sure heat and ventilation in your cabinet is not an issue. if you need better cooling, most upgrades will result in a louder system, but I have found a few very good options that aren't too expensive to get good quiet cooling at a low cost. Ask me later if you need the link. You won't find it in anyone's combo deal.
What is that "System Case Fan"? If it's just a normal case fan, it seems pretty expensive. Normal 3 or 4" case fans can be found for a third of that price.
I have no experience with ECS boards, but you might spend some time looking at
www.amdmb.com and look through their ECS forum. If you see a lot of those people having issues with a specific mobo, or see what mobo people seem to like...etc. They've helped me a lot over the years.
Now is a very good time to buy memory, if you have the cash, and whether or not you need it. 512 MB of PC2100 is averaging $50-$60, compared to the $100 it was earlier this year. Even the better grades of Mushkin and Crucial are dropping, less than $100 now, compared to over $150 in January.