ganda nyan ah. sariwang sariwa!
i think you're off to a good start with what you already have. meguiar's and lexol are always good value for money.
later on when your current supply starts running out, you may want to experiment with other products to see if you like the finish and durability better. some good products to look at are Klasse, Poorboys, P21S, Zaino and FMJ (actually they are my favorites so forgive the bias

). for other members' recommendations please consult the 'detailing thread'
meguiar's 7 and 26 are a glaze and wax combo, right? personally, i prefer Klasse All-in-One + Sealant Glaze, topped off with P21S carnauba wax. mas matrabaho but i like the results better.
imo lang din, but i hate those back-to-black and tire black type products. i just clean my rubber surfaces as best as i can with no treatments to avoid that shiny "greasy" look that i despise. besides, as you say, it doesn't last anyway.
i also don't like to use rubbing compound. much too abrasive for my taste. if i can't get it out with a buffer and swirl remover, then i'd consider getting it painted. maaaybe if i was feeling like taking risks i'd use meguiar's #4 but i often get in trouble with that stuff.
if you painted a surface without properly prepping it, i highly recommend you strip off the old paint job before redoing it. sand it all the way down with fine grit sandpaper (600 then polish with 2000)
if you really want to go all out i suggest you invest in an orbital buffer as well.
good lucK!