Actually, on a long-term Artillery is going to develope with new, self-propelled howitzers. 460th Artillery Battalion is also going to consist completely of professional soldiers.
Tanks are going to be completely withdrawn from service when they reach end of their life-time. That is planned for year 2016 (what decision will be made in the future regarding life-time, I don't know).
Page 4, 5: http://www.slovenskavojska.si/filead...VA_SMER_16.pdf
Page 35, 37: http://www.mo.gov.si/fileadmin/mo.go...V25_slo_en.pdf