TIFF files support LZW compression - try to use this with TIFF files. This is not as good compression as the EPS JPEG compression but it is better than nothing. The only real areas where TIFF files excel over EPS files is the compatibility between different platforms and the ability to colour grayscale tiffs in Quark Xpress and Freehand. Likewise with coloured up grayscale files - you can only do this with TIFF files. This can cause the design package which you have placed them into to run out of memory very quickly and even stop working.
Resolution is a critical component to obtain optimum results.
Resolution is often the hardest part of the scanning process and is often miscalculated. Just make sure you get your final dimensions correct and the DPI of the printer correct and take note of the Mb size - this is always constant no matter how much you scale it in another package. Scanning vastly over the required Mb size only slows down the print process - scanning the above example at 200Mb is only wasting the bureau's and your time. There will be no gain in quality - just less time to print the job. Conversely scanning a file less than 90 Mb may cause bitmapping - depending on the type of image.