I also have an EJ9
viewtopic.php?f=52&t=42863.
Standard, runs around 75bhp when new and I can completly understand about wanting more power. I brought it to basicly save on fuel from having my Impreza Turbo and RX8! lol Its all very well adding bits, I have added 4-2-1 manifold, de-silenced centre pipe, decat, induction kits but in reality I would be lucky to be pushing 90bhp. If you go for a remap that will only add another 5-6bhp (I have checked already) and would cost around £200 for that service. It would be cheaper and better to go for the 1.6 SOHC which already has 125bhp as standard without mods, which is what I will be doing next year.
I understand you do not have the equipment or space for it, so why not phone a garage and ask how much they would charge to rip the 1400 out and replace with a second hand 1600 SOHC block from ebay? There are a few parts that are the same and would save on costs.