if you can't afford a bseries than don't, a dseries is not crap as all these swappers would tell you. The advantages to swapping a dseries are just as good as a b16a would be, now a b18c is a different story all together,and don't get me started on b18c5 and b16b's, because there is no comparison. The b16a is just what everyone is told to do but if you want to do a bseries swap going all motor i would just save up the extra $$ for a GSR motor or ITR. The advantages of the dseries comes in the form of weight of the motor and tranny which are in general usually 70-75 less than the b16 swap, accessablility of parts(d series are EVERYWHERE) whether it be aftermarket or factory parts and a swap generally can be done in most 92up cars from sohc to sohc in about 4 or 5 hours(well if you have friends and are good than the bseries can also be done that fast too). I am just saying aftermarket support for dseries is just as large as bseries, you can get anything you want from cams, to pistons, the sky is the limit. Basically in a crx a dseries vtec motor or dseries non vtec with bolt ons can scoot along with most b16a/hatch's with ease. The only downfalls of d series is not their weak transmissions but their weak transmission gearings, but honestly an LS tranny is very similar to that of the dseries in gearing. The best bet for a dseries owner is to lighten up everything on the motor's rotational parts as possible to allow for quicker reving(underdrive pulleys, lightened flywheel, light weight wheels,etc) and then to make the engine rev up as quick(larger throttle body, the bseries TB's bolt right on in most cases and are found for under 50bucks for an LS throttle body, higher flowing intake manifolds the 96up EX D16Y8 manifold flows better and bolts right on to most dseries heads with little modification if any, headers, intake, exhaust also help to free up the breathing.) Although most dseries don't make power past 7400 rpms many companies such as crower, zex, and skunk2(sometime in the future) make camshafts that will make power upwards to 8g and beyond, although it is not recommended to rev higher than 8 on a dseries head without changing out its internals such retainers,valve springs,valves,etc and also will have effects on the bottom end after time. Just my .02, i love the bseries too, i am not bashing it, just saying that the dseries is very capable of power without breaking you wallet, you just need to research before you do any project.