Get PG Strike Gundam!

Yup just finish this guy last week, haven't started with the lining and decal thought but its a solid kit.

Hah, as of now I'm more fond of cheapo alternative, the Mr. DIY spray, only RM6 per bottle of 400ml Acrylic based, small grain, sticks well, couldn't ask for more!
I believe 90% of people here have this, it is a compulsory to have As you can guess, superb details and articulation that rivald PG, if not outmatch them

If you ask me, I'll say no necessary, since 90% of the inner frame will be covered by outer armor parts....but I kinda like painting all of them.
Some may paint those that are visible after assembly....up to individual opinion 
Alternative funnels are totally different....if you're not aware of this...

The term 'sifu' hope you're not referring to me 
But still can give you some advise....
From your question, which spray, you're referring to type of spray, or color?
Type of spray, depends on your commitment to this hobby.
Long term, go for AB. Beginner set not so expensive, still can find and not bad. If you're experienced modeler, no need to say much...
Short term, can opt for spray cans. Cannot elaborate much in this thread, can try asking in the painting thread....
Color wise, depends on individual....some like original colors, while others may want to customized it themselves.
Hope this helps 

Sorry, forgot to mention this; there's always another type of modelers; straight builders 

I would recommend this guy, but beware, he's a very busy guy, might miss your PM or your post, sometimes you might not even able to PM him due to his mailbox full 
anyway here's the link to tytroum

If you are searching for cheap alternative, get acrylic based spray cans. Samurai, Mr. DIY, Anchor, these are very affordable brands with good results if you can't afford AB

alamak 
yep, AB means airbrush mate...
refer to my previous post regarding choices, airbrush or spray cans.
btw, if you opt for spray cans, mushy already gave you his advise