Your selection of a Meade LX90 ACF is very good. I have one myself. Visually, they're an excellent scope....stars are pinpoint right across any FoV (field of view) with no coma or astigmatism. Photographically, you can use them in their normal alt/az configuration, however, you're restricted to short subs (sub exposures). If you want to do any long exposure pics, you need an equatorial wedge. Plus a few other things such as a guidescope, autoguider etc etc. However that'll be for you sometime down the track when you feel you want to do that sort of photography. The goto tracking system is excellent. I have no trouble getting any target object to come to near centre in an eyepiece once I tell the scope where to go. A few slight adjustments gets the object dead centre. It also tracks very well once I centre the object...slight adjustments every now and then keep the object centred. As far as eyepieces goes, your scope will come with a 26mm eyepiece (EP), which gives you a mag' of about x77. I also have a set of Meade series 4000 eyepieces ranging from 5mm to 40mm....there's 6 or so in a set. Plus you get a polarising (Moon) filter, a x2.5 barlow lens and a set of visual filters as well (4 in a set). The barlow lens effectively increases the power of each EP by it's rated mag'. In this case x2.5. The set comes in a really nice aluminium case with foam to pack everything in. The eyepieces are standard 1.25" EP's but you can also get 2" EP's, though you'll need a 2" barreled diagonal to put them in. Meade series 5000 EP's are good as well, but are dearer than the 4000's. I would also advise you to get a dew hood/shield and a dew zapper for your size scope. That'll keep moisture and such off your corrector plate and prevent it from fogging up. Plus the added benefit of the hood is that it keeps stray light out. Also get yourself a 12V power supply. Preferably one around 12-18amh. Although you can run the scope on C cells (8 of them), it's not advisable. With heavy use they can run low pretty quick!!!. And get yourself a good carrying case large enough to stick your scope in. A Pelican case would be good, but they're expensive. You can get away using a largish toolbox with foan inserts or have a wooden one made.
If you need anymore advice, PM me or just post here. There are a few of us here that have LX90's and LX200's and we'll be more than happy to help