Some dealers will give you a pick of what your actual engine looks like before they send it. Sometimes you can ask but most of the guys selling engines don't even have them... they just get them shipped from a warehouse. I have heard of some people getting a piece of crap when the were shown a good picture but i ask for a pic of what i was getting.
Well by you budget I would have to say you would want to go with a B16a1 swap.
First off you should really think about everything you will need depending on what type of Civic you have you not only have to deal with the axles but also some wiring.
If you got a civic si your wiring will be very simpe. If you got anything else you have a good deal of rewiring to do. Unless you have lots of wiring experience(hooking up speakers and amps doesn't count) you gotta look into the wiring harnesses
HASport has to offer. This eliminate the headaches rewiring wil cause.
If you get a HASport harness its just a matter of getting a used injector resistor box off a 88-91 Civic/CRX Si, Ex, or HF.
AXLES-Whatever mount kit you get I would go with whatever that manufacture recommends.
MOUNTS- You can save yourself some money by checking out eBay or usually a swap dealer will give you the at cost. Also check forums for used mounts(usually still good and can save you up to $100)
ODDS & ENDS- You have to get all new hoses and if you want to keep your A/C (if you have it) that will add cost with the new A/C bracket you have to buy and to have your system recharged. If just got all the belts and hoses. HASport has there "shopping list" online and you can also check out
JDM Parts for other useful info if you want to upgrade you plugs, wires, or anything else.
If you tell me what kinda car you have(year, model, make) i maybe able to give you some cheaper options that will give you almost the same results.