Ultimate Apple IIe
(stolen from sfahey of applefritter.com)

As to what you can add to "trick" it out, you have realistic options and "hard to come by" (HTCB) options.

The Aux slot is easy - RamWORKS III 1024K RAM - board has expansion for an add 2MB and RGB options, which
are both in the HTCB category.

Slot 1 - Apple Workstation card - depends if you want to print serial or parallel. For serial printing
(Imagewriter), I recommend getting an Apple Workstation card because not only does it provide networking
(which you might want to do someday) but it also acts like a super serial card. Kills two birds with one
slot. If you're printing to a parallel printer (Epson), get a Grappler of some sort.

Slot 2 - Mouse card or Sound card (see slot 4) - depends on what you're going to do... but I usually put a
super serial card here or an internal modem. If you get a SSC, look for a Turbo ASB option - but thats
HTCB, nearly impossible even.  The Turbo ASB is a piggy-back mod that replaces the slow 6551 for higher,
more reliable data rates (19.2 -> 230.4, IIgs or accelerated //e required).

Slot 3 - Transwarp IIe from Applied Engineering or ZipChip 8000. If you can find a ZipChip or a RocketChip,
you can leave this slot empty and save power. If you can get a ZipChip or RocketChip to replace your stock
65(c)02 processor, you save a slot and you'll get 4-5MHz, or 8-10MHz depending on what model you find. Those
are HTCB.

Slot 4 - Sound Card / RamFactor - options options options... a mouse card? yeah, but not much out there
really uses the mouse on a //e or //c. A sound card like a Mockingboard or an AE Phasor would be better. You
can also add additional RAM with an Apple "slinky" board (another 1024K) or an AE RamFACTOR (again 1024K, or
5192K with a HTCB add-on).

Slot 5 - SCSI Controller / 3.5 SuperDrive controller - Either a Apple "Liron" controller for UniDisk 3.5 or the HTCB Apple 3.5
Drive Controller (aka SuperDrive) which uses the more common Apple 3.5 drives used by the Apple //GS.

Slot 6 - CFFA card / 5.25 floppies here...

Slot 7 - CFFA card

Also, a Dallas Semiconductor No-Slot-Clock for date and time stamping your files.

A heavy duty power supply.