<p>Some more thoughts on going with "native" m4/3 lenses. I had Canon T3i and 7D bodies with the two "kit" lenses you have plus the EF 24mm f2.8, EF 28mm f1.8, EF 50mm f1.8 and 2 "L" series lenses: The EF 17-40mm f4 and EF 70-200 f4. I was kind of trying out m4/3 with an older model Olympus Pen E-PL1 and had the Lumix 14mm f2.5 and the 20mm f1.7 when I stumbled across Bruce Dale's "Summer Morning" (
) shot with a "bone stock" pre-production GH2.</p>
<p>The beautiful skin tones (I'm a retired portrait photographer) and crisp detail stunned me, I loved the look, put my Canon stuff (as good as it was) up for sale and never looked back. At age 77 one benefit of going with the GH2's and "native" lenses was tremendous lightening of the weight I was carrying around in the bag. The GH3 and GH4 got a bit bigger and heavier but the IQ just kept on improving.</p>
<p>I mainly work with the GH4 and G7 in 4K, edit on a 4K timeline, save the project as 4K (never know when you may have to come back to it), and then render out to 1080p and that's the nicest looking 1080p you'll see. So in your case I'd keep the GH4 and as a first native lens I'd go for the Lumix 20mm f1.7, the new Lumix 25mm f1.7, or Olympus m.Zuiko 25mm f1.8. The 20 is what I'd call "wide normal" (and some feel the autofocus is slow but that never bothers me), the 25's are "normal" for the m4/3 format. Next I'd go for the Lumix 14mm f2.5 and either the Oly 45mm f1.8 or the Lumix 42.5mm f1.7 (has OIS).</p>
<p>With those 3 you can do a lot of video/motion picture work for awhile. At some point you will likely need to upgrade to a more powerful PC. I'm using a Dell right now from the Dell outlet "refurb, scratch 'n dent", has a 4th generation Intel Core i7 processor that seems to move right along. I also had to upgrade editing software, I've used Pinnacle Studio since and unnumbered version that came with a "firewire" card I had to put in the PC. I'm on version 18.5 now and about to go for 19.</p>
<p>So I suggest one of the "normal" lenses for the GH4 and start shooting a lot of test footage aiming for the look you want in that "feature". I'm having best look with the NATURAL profile and I like what I've seen with PORTRAIT profile on folks' skin tones. I hope what I've laid out here is some help to you. Canon, Nikon, Sony and others are coming out with 4K gear, you've got a great tool in that GH4, have fun with it.</p>