SERP: Search engine ranking position, If you have good position(SERP) in major search engines then you must be have good traffic then in this way you can able to get good sale leads with search engine ranking position. Now about PR: Page Rank, Page rank is importance of website at view point of search engine if your website is more search engine friendly and it's complete user friendly then it's automatically you will get good page rank by Google. I am also agree with you. Both are important PR and SERP.
Sorry but SERP means Search Engine Results Page. Also having a good SERP doesn't mean you also have good traffic. You can have like 10 traffic a day but still get 1st page position in SERP. PageRank on the otherhand is all about inbound links. Come on people just look at PageRank in Wiki. Stop spreading wrong information. PageRank is not about having a search friendly website.
Do Concentrate more for SERP because once your site listed in the top means you can have a lots of traffic . So First concentrate on the SERP and then focus on the pagerank.
They are 2 very different things.you need to focus on link building to improve your site in the SERPs.You will also see your PR improve in no time.
Page rank is nothing but shows quality of your site. But SERP only can provide you more traffic. so improve your SERP
I think the SERP is more important,high SERP can get More Traffic. can High PR get High SERP? ido'nt know.
PR can help your serps but you shouldn't worry about it as much as serps. SERPs get you traffic. You can have a high PR and low traffic. I wouldn't worry about it unless you want to do a link exchange or sell the site.
the question is how do you build links? then tell me if PR is not affected with the way on how you build links.