im a college guy and as we all know have a very shallow pocket, i saw the observer on the print ads and i just told myself that i have to buy one, i am actually saving my hard earned dough for a tag heuer f1 series watch to replace my old model tag-heuer f1 i got from graduation in hs,but i saw the price for the observer and i just knew that i would be able to buy an observer sooner and frankly i like how it looks better than the tagheuer f1 watch i was planning to buy

heres the question:
I was thinking of buying the stainless steel observer with elastomer strap(299$) but i want to have a watch that i could wear on formal occassions so i was wondering how much would an observer stainless/elastomer strap cost if i decide to switch the straps back and forth?
where can i buy the stainless/elastomer strap?
i saw in the forum that swaping the straps is quite complicated is this true?
which observer model(ti/ti, s/s,s/e) would you say is worth buying if you have a limited budget like me?
and last question if you guys are gonna buy a suunto watch for its looks alone what model would you all reccomend?

hope you could help me on this one cause the sooner i decide the sooner this watch would stop showing up in my dreams thanks in advance.